Missing viewpoint 'org.polarsys.kitalpha.vp.requirements'

Hi all,
can you pls help for solving below error.
org.polarsys.capella.common.platform.sirius.ted.MetadataExce ption: Missing viewpoint ‘org.polarsys.capella.vp.requirements’
Missing viewpoint ‘org.polarsys.kitalpha.vp.requirements’
at org.polarsys.capella.common.platform.sirius.ted.SiriusSessio nFactory$SessionMetadataHelper.checkMetadata(SiriusSessionFa ctory.java:163)

You must have opened a model that references the Requirement viewpoint while the latter is not installed on your Capllea. Could you have a check on that?

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